Yuta Kurosawa

- Allow Theme to be added with hugo mod. - Deploy button on [vercel.com](https://vercel.com/) does not do `git clone MY_REPOSITORY --recusive` by default, so build fails - Solve it by...

#25 shows that the documentation is outdated or wrong. So, rewrite the documentation to bring it up to date

Ref: https://vercel.com/docs/deploy-button

Make the navbar look better on smartphones.

- [ ] Delete PULL REQUEST - [ ] Separate of style.html and CSS